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Finding the Fourth Proportional to 487,501.20, 731,251.80 and 328,068.90

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Solution

The fourth proportional to 487,501.20, 731,251.80 and 328,068.90 is: 492,103.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,501.20 : 731,251.80 = 328,068.90 : x
  2. Step 2: Convert to fraction form
    487,501.20/731,251.80 = 328,068.90/x
  3. Step 3: Cross multiply
    487,501.20x = 731,251.80 × 328,068.90
  4. Step 4: Simplify right side
    487,501.20x = 239,900,973,649.02
  5. Step 5: Solve for x
    x = 239,900,973,649.02/487,501.20
  6. Step 6: Final answer
    x = 492,103.35

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.